package cn.bqjr.eily.utils;

import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

import java.util.List;
import java.util.stream.Collectors;

/**
 * Spring Context Bean Utils
 *
 * @author hillfly
 */
@Component
public class SpringContextUtils implements ApplicationContextAware {
    private static ApplicationContext applicationContext = null;

    @Override
    public void setApplicationContext(ApplicationContext app) {
        this.applicationContext = app;
    }

    //获取applicationContext
    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }

    //通过name获取 Bean.
    public static Object getBean(String name) {
        return getApplicationContext().getBean(name);

    }

    //通过class获取Bean.
    public static <T> T getBean(Class<T> clazz) {
        return getApplicationContext().getBean(clazz);
    }

    //通过name,以及Clazz返回指定的Bean
    public static <T> T getBean(String name, Class<T> clazz) {
        return getApplicationContext().getBean(name, clazz);
    }

    public static <T> List<T> getBeans(Class<T> clazz) {
        return getApplicationContext().getBeansOfType(clazz)
                                      .values()
                                      .stream()
                                      .collect(Collectors.toList());
    }
}
